Germinated Brown Rice Starch Gelatinization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Brown rice cooked at normal pressures is hard and dry due to its bran layer, which prevents heat and water absorption, leading to insufficient starch gelatinization and nutrient breakdown, resulting in poor taste and cooking quality. Additionally, germination processes often result in loss of nutrients and fermentation issues.
Innovation Solution
Increasing the content of direct reducing sugar and sucrose in germinated brown rice, along with partial gelatinization of starch to alpha starch, while controlling water absorption and minimizing cracking, to enhance taste and cooking properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If brown rice is cooked at normal pressures, then the bran layer structure is preserved, but starch does not gelatinize sufficiently and the rice is hard and dry
Solution Approach 1:
The patent applies preliminary action by soaking brown rice in warm water (5-50°C) for 5-50 hours before cooking to initiate germination. This pre-treatment softens the bran layer and activates enzymes that will facilitate starch gelatinization during subsequent cooking at normal pressures, resolving the contradiction between preserving bran structure and achieving sufficient gelatinization.
Solution Approach 2:
The patent changes parameters by controlling temperature (5-50°C soaking, then cooking at 100°C or higher) and time (5-50 hours soaking) to achieve germination. These parameter changes enable the bran layer to become sufficiently soft while allowing complete starch gelatinization, overcoming the limitation of normal pressure cooking without germination.
2Manufacturing precision
If brown rice is cooked under higher pressures, then the outer layer softens and starch gelatinizes, but vitamins and nutrients break down
Solution Approach 1:
The patent uses preliminary germination soaking (5-50 hours at 5-50°C) to pre-soften the bran layer and activate enzymes. This preliminary action allows subsequent cooking at normal pressures (100°C or higher) to achieve complete starch gelatinization and nutrient preservation without requiring high-pressure cooking that would cause vitamin breakdown.
3Manufacturing precision
If brown rice is soaked in warm water to germinate, then soft cooked brown rice can be obtained, but constituents are lost through metabolic action and water
Solution Approach 1:
The patent optimizes parameters by limiting soaking temperature to 5-50°C and time to 5-50 hours, then cooking at 100°C or higher. This controlled parameter change achieves sufficient germination for soft cooking while minimizing excessive metabolic breakdown and water-soluble constituent loss that would occur with prolonged or uncontrolled soaking.
4Duration of action of stationary object
If germinated brown rice is dried, then shelf life is extended, but the rice absorbs water during germination and cracks during drying
Solution Approach 1:
The patent controls the drying process by managing water content reduction from the germinated state. By optimizing the germination soaking parameters (5-50°C for 5-50 hours) followed by controlled drying, the patent prevents excessive water absorption during germination and subsequent cracking during drying, thereby extending shelf life while maintaining rice integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The approach results in germinated brown rice with improved taste, texture, and nutrient retention, achieving cooking properties similar to white rice, with reduced cracking and extended shelf life.
Implementation Method 1
the brown rice absorbs water in the germinating process and the swollen germinated rice cracks in the drying process
Implementation Method 2
alpha starch produced through partial gelatinization of starch
Data Source
AI summary
It is intended to provide germinating brown rice having an improved taste and cooking characteristics. Namely, germinating brown rice containing at least a direct reducing sugar component in an elevated amount compared with the starting brown rice and, if necessary, further containing α-starch prepared by the gelatinization of a part of starch.